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Nesterov SV, Zakurdaeva OA, Kochetkova MA, Kuchkina IO. Radical channels of radiation destruction of macrocyclic component of strontium-selective extractants based on ionic liquids. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2906-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nesterov SV, Zakurdaeva OA, Sokolova NA, Rudakova TA, Feldman VI. Conformational insight into radiation-chemical transformations of dicyclohexano-18-crown-6 complexes with alkaline earth metal chlorides: Effect of cation size. Radiat Phys Chem Oxf Engl 1993 2019. [DOI: 10.1016/j.radphyschem.2019.108368] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zakurdaeva OA, Nesterov SV, Sokolova NA, Dorovatovskii PV, Zubavichus YV, Khrustalev VN, Asachenko AF, Chesnokov GA, Nechaev MS, Feldman VI. Evidence for Indirect Action of Ionizing Radiation in 18-Crown-6 Complexes with Halogenous Salts of Strontium: Simulation of Radiation-Induced Transformations in Ionic Liquid/Crown Ether Compositions. J Phys Chem B 2018; 122:1992-2000. [PMID: 29328650 DOI: 10.1021/acs.jpcb.7b11498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ionic liquid/crown ether compositions are an attractive alternative to traditional extractants in the processes for spent nuclear fuel and liquid radioactive wastes reprocessing. These compositions are exposed to ionizing radiation, and their radiation stability, especially in the presence of metal salts, is a crucial issue. In the present study, the macrocyclic 18C6·Sr(BF4)2 and 18C6·Sr(PF6)2 complexes simulating the components of metal loaded ionic liquid/crown ether extractants were synthesized and their structures were characterized by FTIR spectroscopy and single-crystal X-ray diffraction analysis. Inclusion of Sr2+ cation into the 18C6 cavity resulted in more symmetric D3d conformations of the macrocycle. The structural transformations of the crown ether were accompanied by an elongation of polyether C-O bonds that could increase the possibility of radiolytic cleavage of the macrocycle. However, EPR study of the synthesized compounds subjected to X-ray irradiation revealed predominant formation of macrocyclic -CH2-ĊH-O- radicals. This result demonstrated an evidence for indirect action of ionizing radiation on individual components of the complexes and was reasonably described by a positive "hole" transfer from primary macrocyclic radical cation to fluorous anion at the primary stages of radiolysis and a subsequent interaction of fluorine atom with 18C6 macrocycle in secondary radical reactions. The observed effects may be partially responsible for enhanced sensitivity of the ionic liquid/crown ether extractants to ionizing radiation due to chemical blocking of the crown ether with radiolytic HF, radiation-chemical degradation of the 18C6, and precipitation of a low-soluble SrF2.
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Affiliation(s)
- Olga A Zakurdaeva
- Enikolopov Institute of Synthetic Polymer Materials of RAS , ul. Profsoyuznaya, 70, Moscow 117393, Russia
| | - Sergey V Nesterov
- Enikolopov Institute of Synthetic Polymer Materials of RAS , ul. Profsoyuznaya, 70, Moscow 117393, Russia.,Department of Chemistry, Lomonosov Moscow State University , Moscow 119991, Russia
| | - Natalya A Sokolova
- Zelinsky Institute of Organic Chemistry of RAS , Leninsky Prospect, 47, Moscow 119991, Russia
| | | | - Yan V Zubavichus
- NRC Kurchatov Institute , Acad. Kurchatov Sq., 1, Moscow 123182, Russia
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia (RUDN University) , ul. Miklukho-Maklay, 6, Moscow 117198, Russia
| | - Andrey F Asachenko
- Peoples' Friendship University of Russia (RUDN University) , ul. Miklukho-Maklay, 6, Moscow 117198, Russia.,Topchiev Institute of Petrochemical Synthesis of RAS , Leninsky Prospect, 29, Moscow 119991, Russia
| | - Gleb A Chesnokov
- Department of Chemistry, Lomonosov Moscow State University , Moscow 119991, Russia.,Topchiev Institute of Petrochemical Synthesis of RAS , Leninsky Prospect, 29, Moscow 119991, Russia
| | - Mikhail S Nechaev
- Department of Chemistry, Lomonosov Moscow State University , Moscow 119991, Russia.,Topchiev Institute of Petrochemical Synthesis of RAS , Leninsky Prospect, 29, Moscow 119991, Russia
| | - Vladimir I Feldman
- Enikolopov Institute of Synthetic Polymer Materials of RAS , ul. Profsoyuznaya, 70, Moscow 117393, Russia.,Department of Chemistry, Lomonosov Moscow State University , Moscow 119991, Russia
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